The bestselling and very highly-rated Game Dev Story (4.5/5 stars, all ages) is today’s Amazon Free App of the Day. From Amazon:
Manage your own game company and try to create a million-selling game in this unique simulation.
Features the ability to develop your company’s own game console, plus a system for changing your staff members’ professions.
Your staff members can have a variety of game-related professions, from programmer to sound engineer.
Work hard and you may reach the top of the video game industry!
This game review video gives a good idea of how the game works:
Game Dev Story: get it today, while it’s the Free App of the Day!